/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System;
using System.Collections.Generic;
using System.Linq;
using Composite.Core.Types;
using Composite.Data.DynamicTypes;


namespace Composite.Data.Foundation.CodeGeneration
{
    /// <summary>
    /// This class handles data wrapper types and cashing.
    /// It will through <see cref="DataWrapperCodeGenerator"/> genereated
    /// data wrapper class types if needed.
    /// </summary>
    internal static class DataWrapperTypeManager
    {
        private static readonly object _lock = new object();


        public static Type GetDataWrapperType(Type interfaceType)
        {
            Type wrapperType = TryGetWrapperType(interfaceType.FullName);
            if (wrapperType != null) return wrapperType;

            lock (_lock)
            {
                wrapperType = TryGetWrapperType(interfaceType.FullName);
                if (wrapperType != null) return wrapperType;

                var codeGenerationBuilder = new CodeGenerationBuilder("DataWrapper:" + interfaceType.FullName);

                DataWrapperCodeGenerator.AddDataWrapperClassCode(codeGenerationBuilder, interfaceType);

                IEnumerable<Type> types = CodeGenerationManager.CompileRuntimeTempTypes(codeGenerationBuilder);

                return types.Single();
            }
        }



        public static Type GetDataWrapperType(DataTypeDescriptor dataTypeDescriptor)
        {
            Type wrapperType = TryGetWrapperType(dataTypeDescriptor.GetFullInterfaceName());
            if (wrapperType != null) return wrapperType;

            lock (_lock)
            {
                wrapperType = TryGetWrapperType(dataTypeDescriptor.GetFullInterfaceName());
                if (wrapperType != null) return wrapperType;

                var codeGenerationBuilder = new CodeGenerationBuilder("DataWrapper:" + dataTypeDescriptor.GetFullInterfaceName());

                DataWrapperCodeGenerator.AddDataWrapperClassCode(codeGenerationBuilder, dataTypeDescriptor);

                IEnumerable<Type> types = CodeGenerationManager.CompileRuntimeTempTypes(codeGenerationBuilder);

                return types.Single();
            }
        }



        /// <summary>
        /// Returns a wrapper type, if it already exists.
        /// </summary>
        public static Type TryGetWrapperType(string fullName)
        {
            string dataWrapperFullName = DataWrapperCodeGenerator.CreateWrapperClassFullName(fullName);

            Type wrapperType = TypeManager.TryGetType(dataWrapperFullName);

            return wrapperType;
        }
    }
}
